com.endeca.navigation.analytics
Class FilterIn

A FilterIn is a Filter that checks membership of
a given set of values in a table. The membership is checked with a
set of lookup expressions in a LookupList that is set in
the FilterIn.

This filter:

"[expression1, expression2] IN MyTable"

is semantically correct if MyTable is GROUPED
by the same number of fields as the number of expressions within brackets
"[...]". In this way, the contents of the brackets uniquely identify a
record in MyTable. Brackets with no expression list within represent access
to a table that is GROUPed to a single record.

Because the implicit tables NavStateRecords and AllBaseRecords are not
GROUPED, it is not possible to do a lookup on these tables.